1 /*
2 * nghttp2 - HTTP/2 C Library
3 *
4 * Copyright (c) 2016 Tatsuhiro Tsujikawa
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "xsi_strerror.h"
26
27 /* Make sure that we get XSI-compliant version of strerror_r */
28 #ifdef _POSIX_C_SOURCE
29 # undef _POSIX_C_SOURCE
30 #endif /* _POSIX_C_SOURCE */
31
32 #ifdef _GNU_SOURCE
33 # undef _GNU_SOURCE
34 #endif /* _GNU_SOURCE */
35
36 #include <string.h>
37
xsi_strerror(int errnum,char * buf,size_t buflen)38 char *xsi_strerror(int errnum, char *buf, size_t buflen) {
39 int rv;
40
41 rv = strerror_r(errnum, buf, buflen);
42
43 if (rv != 0) {
44 if (buflen > 0) {
45 buf[0] = '\0';
46 }
47 }
48
49 return buf;
50 }
51